Original guns, worn but well maintained, are fine as is. When I enounter a gun that looks like it might have spent some years in the barn and clubbed a weasel or two. a refinish could do nothing but help.
What really bothers me, and this will step on some toes, is when I know a guy started out with a nice gun, habitually handled it by the barrels, took every opportunity to wrap his hands around a nice case colored receiver, and used the stock to close kennel/car doors and lift barbwire, and five years down the road wants to refinish it. Like he has no idea how it got the way it is and can't think far enough in front of him to see what will happen to the gun (again). That's the downside of refinishing. Kind of like the five-year facelift.
